EVP_RAND_CTX_get0_rand
rand = EVP_RAND_CTX_get0_rand(drbg);
EVP_RAND *EVP_RAND_CTX_get0_rand(EVP_RAND_CTX *ctx);
|| strcmp(EVP_RAND_get0_name(EVP_RAND_CTX_get0_rand(rng)),
prov = EVP_RAND_get0_provider(EVP_RAND_CTX_get0_rand(primary));
prov = EVP_RAND_get0_provider(EVP_RAND_CTX_get0_rand(privctx));